We run down the list of potential unknowns facing the Mariners and debate which will have the most impact on this season. Will it be Jarred Kelenic's swing adjustment? A healthy, productive Evan White? Kolten Wong's defense? Or something else? Lefko & Ryan are joined by Joe Fann to discuss the pitching rotation in his most recent article at SeattleSports.com and what we could see happen in the bullpen before discussing which new MLB rule(s) will be toughest to enforce?

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